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Some wave-particle effects on large-scale Alfven wave propagation and dampingPhase mixing can reduce greatly the torsional Alfven wave's dissipation length for propagation in complex magnetic field-line geometries. This phase mixing causes significant energy transfers from large to small scales where a conversion from ordered wave energy into a particle kinetic form occurs. This conversion during its initial stages is an entropy conserving process well described by Vlasov theory, Nonlinear stages of wave-particle resonance, particle trapping, and collisional resistivity are often invoked as processes eventually responsible for converting ordered wave motions into random thermal motion. Strictly speaking, this entropy producing phase cannot be described within Vlasov theory, and the large-scale effects of these microscopic events resides at the difficult frontier between generalized fluid and kinetic theories. We attempt to describe certain aspects of such resonances within the framework of fluid theory focusing on torsional Alfven wave energy transport and deposition within flux tubes.
Document ID
19960021342
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Siregar, E.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Goldstein, M. L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 17, 2013
Publication Date
June 30, 1995
Subject Category
Geophysics
Accession Number
96N24738
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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